Java tutorial
//package com.java2s; /** * OnionCoffee - Anonymous Communication through TOR Network * Copyright (C) 2005-2007 RWTH Aachen University, Informatik IV * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ import java.util.logging.Level; import java.util.logging.Logger; public class Main { /** * This method recursively visits (log.info()) all thread groups under `group'. * * @param log * @param logLevel */ public static void logThreadGroup(Logger log, Level logLevel, ThreadGroup group, int level) { // Get threads in `group' int numThreads = group.activeCount(); Thread[] threads = new Thread[numThreads * 2]; numThreads = group.enumerate(threads, false); // Enumerate each thread in `group' for (int i = 0; i < numThreads; i++) { // Get thread/ Thread thread = threads[i]; log.log(logLevel, thread.toString()); } // Get thread subgroups of `group' int numGroups = group.activeGroupCount(); ThreadGroup[] groups = new ThreadGroup[numGroups * 2]; numGroups = group.enumerate(groups, false); // Recursively visit each subgroup for (int i = 0; i < numGroups; i++) { logThreadGroup(log, logLevel, groups[i], level + 1); } } }